supply of levelling instrument - bosch/sokkia make or similar automatic level- gol 32d; article number- 3 601k68 500; working range- 120m; height accuracy for an individual measurement- 1mm/30m; deviation for 1 km double run leveling- 1.0mm; accuracy of the bubble vial- 8 1/2mm; and compensator levellling range- +15 firms offer:geo-fennel precision automatic level model gfn 10, 360? (32x) with tripod with levelling staff ? export quality levelling staff 5 meters long model alt?5 (e) made out of extruded aluminium alloy, telescopic in 5 sections, duly pained with superior quality waterproof paint, with push button fastening/locking arrangement, graduations in metric system as per iss confirming to international standards complete in waterproof cordura case.levelling instrument - bosch/sokkia make or similar automatic level- gol 32d; article number- 3 601k68 500; working range- 120m; height accuracy for an individual measurement- 1mm/30m; deviation for 1 km double run leveling- 1.0mm; accuracy of the bubble vial- 8 1/2mm; and compensator levellling range- +15 firms offer:geo-fennel precision automatic level model gfn 10, 360? (32x) with tripod with levelling staff ? export quality levelling staff 5 meters long model alt?5 (e) made out of extruded aluminium alloy, telescopic in 5 sections, duly pained with superior quality waterproof paint, with push button fastening/locking arrangement, graduations in metric system as per iss confirming to international standards complete in waterproof cordura case.,levelling instrument - bosch/sokkia make or similar automatic level- gol 32d; article number- 3 601k68 500; working range- 120m; height ac curacy for an individual measurement- 1mm/30m; deviation for 1 km double run leveling- 1.0mm; accuracy of the bubble vial- 8 1/2mm; and compensator le vellling range- +15 firms offer:geo-fennel precision automatic level model gfn 10, 360? (32x) with tripod with levelling staff ? export quality levelling sta ff 5 meters long model alt?5